code: def test_configuration(self):
      explore_configs = [
          dict(
              of_type="explorestub", some="args", rval=1, no_call=False
          ),
          dict(
              of_type="explorestub",
              other="args",
              rval=None,
              no_call=True,
          ),
      ]
      explore = PipelineExplore(explore_configs)
  
      assert explore.configuration == dict(
          of_type="pipelineexplore", explore_configs=explore_configs
      )
  
imports: import numpy
  import pytest
  from base import RNGStub, TrialStub
  from orion.algo.pbt.explore import PerturbExplore, PipelineExplore, ResampleExplore
  from orion.algo.space import Categorical, Dimension
  from orion.core.utils.flatten import flatten
label_desc: Use image node_id 3 for calling the TestPipelineExplore obj's underlying member method code with example usage: obj.test_configuration() without return types